Space System

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Across
  1. 3. an imaginary line about which a body rotates
  2. 6. and instrument used to see far away
  3. 9. a unit of measurement that measures the distance that light travels in a year
  4. 11. a small planet
  5. 12. a large natural body that travels around the earth
  6. 13. the science that deals with the universe
  7. 15. lines up all electromagnetic based on their wavelengths
  8. 18. where are planets are
  9. 19. traveling around another object
Down
  1. 1. electromagnetic radiation
  2. 2. a number used to multiply one object to get another
  3. 4. a small object that orbits a big object
  4. 5. this is a sphere made of mostly icy material
  5. 7. the idea that the universe began with an explosion
  6. 8. a big circular body tat moves in an elliptical orbit around a things
  7. 10. everything that exsists in space
  8. 14. an object in the night's sky that lights up and moves
  9. 16. lumps of ice , dust, and rock that circle the sun
  10. 17. a measure of the amount of matter in objects